Alert archive / Vermont / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 20, NWS Burlington, VT

July 27, 2014Caledonia County, Essex County, Washington County, Vermont

NWS Burlington, VT issued this severe thunderstorm warning at Jul 27, 2014, 7:32 PM EDT for Caledonia County, Essex County, Washington County, Vermont. It was in force for 43 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 27, 2014, 7:32 PM EDT (23:32 UTC)
Expired: Jul 27, 2014, 8:15 PM EDT
In force: 43 min
Issued by: NWS Burlington, VT
Area: Storm-based polygon

Counties Caledonia County, VT, Essex County, VT, Washington County, VT

The radar

The Burlington radar (KCXX), 81 km from the middle of the area, began a volume at 23:32 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Gray, ME (KGYX), launched 12:00Z, 11.5 hours before the alert went out and 165 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1474 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 29 m²/s²
0-3 km storm-relative helicity: 114 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Burlington, VT wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 27, 6:51 PM EDT, 41 minutes earlier.

Area forecast discussion, Jul 27, 6:51 PM EDT, 41 minutes before

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Hazardous weather outlook, Jul 27, 4:34 PM EDT, 2 hours 58 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BURLINGTON VT
434 PM EDT SUN JUL 27 2014

NYZ026>031-034-035-087-VTZ001>012-016>019-282045-
NORTHERN ST. LAWRENCE-NORTHERN FRANKLIN-EASTERN CLINTON-
SOUTHEASTERN ST. LAWRENCE-SOUTHERN FRANKLIN-WESTERN CLINTON-
WESTERN ESSEX-EASTERN ESSEX-SOUTHWESTERN ST. LAWRENCE-GRAND ISLE-
WESTERN FRANKLIN-ORLEANS-ESSEX-WESTERN CHITTENDEN-LAMOILLE-CALEDONIA-
WASHINGTON-WESTERN ADDISON-ORANGE-WESTERN RUTLAND-WINDSOR-
EASTERN FRANKLIN-EASTERN CHITTENDEN-EASTERN ADDISON-EASTERN RUTLAND-
434 PM EDT SUN JUL 27 2014

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHERN NEW YORK...CENTRAL
VERMONT...NORTHEAST VERMONT...NORTHWEST VERMONT AND SOUTHERN
VERMONT.

.DAY ONE...TONIGHT.

SCATTERED THUNDERSTORMS WILL MOVE ACROSS NORTHERN NEW YORK AND
VERMONT THROUGH SUNSET. ANY STORMS WILL HAVE TO POTENTIAL TO
PRODUCE GUSTY WINDS...IN THE 40 TO 50 MPH RANGE...SMALL HAIL...AND
FREQUENT LIGHTNING.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.

A POTENT MID-SUMMER LOW PRESSURE AREA WILL TRACK ACROSS THE NORTH
COUNTRY ON MONDAY. STRONG THUNDERSTORMS WILL BE POSSIBLE ON THE
EASTERN SIDE OF THIS LOW PRESSURE AREA...PRIMARILY ACROSS CENTRAL
AND EASTERN VERMONT. MODERATE RAIN WILL FALL AND BRING A WETTING
RAINFALL ELSEWHERE. NO HYDROLOGIC ISSUES ARE ANTICIPATED FROM THIS
RAINFALL AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

In the hours before

Special weather statement, Jul 27, 6:17 PM EDT, 1 hour 15 minutes before

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Special weather statement, Jul 27, 6:45 PM EDT, 47 minutes before

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Local storm report, Jul 27, 6:57 PM EDT, 35 minutes before

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Special weather statement, Jul 27, 7:04 PM EDT, 28 minutes before

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Special weather statement, Jul 27, 7:15 PM EDT, 17 minutes before

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Local storm report, Jul 27, 7:29 PM EDT, 3 minutes before

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The office that day

Everything else NWS Burlington, VT issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 27, 5:40 AM EDT	Special Weather Statement	BTV	Addison, Chittenden, Franklin, Grand Isle	110 min
Jul 27, 3:33 PM EDT	Special Weather Statement	BTV	Addison	57 min
Jul 27, 4:14 PM EDT	Special Weather Statement	BTV	Addison	46 min
Jul 27, 4:23 PM EDT	Special Weather Statement	BTV	Franklin, Grand Isle	37 min
Jul 27, 4:56 PM EDT	Special Weather Statement	BTV	Addison	64 min
Jul 27, 5:05 PM EDT	Severe Thunderstorm Warning	BTV	Addison, Chittenden, Washington	55 min
Jul 27, 5:12 PM EDT	Special Weather Statement	BTV	Windsor	63 min
Jul 27, 5:18 PM EDT	Special Weather Statement	BTV	Chittenden	42 min
Jul 27, 5:53 PM EDT	Special Weather Statement	BTV	Chittenden, Lamoille	52 min
Jul 27, 6:10 PM EDT	Special Weather Statement	BTV	Caledonia, Washington	65 min
Jul 27, 6:17 PM EDT	Special Weather Statement	BTV	Rutland, Windsor	58 min
Jul 27, 6:26 PM EDT	Severe Thunderstorm Warning	BTV	Rutland, Windsor	52 min
Jul 27, 6:45 PM EDT	Special Weather Statement	BTV	Essex, Lamoille, Orleans	60 min
Jul 27, 7:04 PM EDT	Special Weather Statement	BTV	Chittenden, Franklin, Grand Isle	41 min
Jul 27, 7:15 PM EDT	Special Weather Statement	BTV	Caledonia	60 min
Jul 27, 7:46 PM EDT	Special Weather Statement	BTV	Chittenden, Lamoille	59 min
Jul 27, 8:04 AM EDT	Special Weather Statement	BTV	Essex	56 min
Jul 27, 5:01 PM EDT	Special Weather Statement	BTV	St. Lawrence	59 min

Nearby

Severe Thunderstorm Warnings in Vermont, 2014 Every severe thunderstorm warning in 2014

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.